I'm most familiar with "serial cuts," but all three are used (all show references in the low hundreds).

A histological study of **serial cuts** of the breast shows that the must ... As in
the histological study, serial cuts are indispensable in X-ray examination. ...
www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve& db=PubMed&list_uids=599513&dopt=Abstract

IL-15/IL-15R{alpha} Intracellular Trafficking in Human Cells and ...
In these pictures, confocal microscopy analysis was performed on **serial cuts** of
1 µm thickness from the outside of the cell toward the inner compartments. ...
www.annalsnyas.org/cgi/content/full/876/1/236

Histopathological study of the Ehrlich tumor The **histologic cuts** from each tumor
were made according to the largest diameter. ...
www.linkgrinder.com/tutorials/Antitumor_ effectiveness_of_differen_21187_BMC-Cancer_article.html

From each block, 10 **histological cuts** are sectioned, with cuts 2 and 7 reserved
for immunohistochemistry study using the S-100 protein. ...
www.gbm.org.br/boletim/2003/infor23.asp?vrsweb=En

[New method of culture of Mycobacterium tuberculosis on **histological slices** taken
from lungs of tuberculous patients and on lung slices from animals ...
www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve& db=PubMed&list_uids=13074984&dopt=Abstract



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Note added at 11 hrs 54 mins (2005-07-18 01:27:50 GMT)
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I like \"serial cuts\" because it is more specific -- i.e., that a series of cuts were taken.